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Subject: Re: (meteorobs) Sporadic E outburst?

> Subject: Re: (meteorobs) Sporadic E outburst?
> Date: Sat, 26 Oct 2002 00:08:57 -0000
> From: "drobnock2" <drobnock@penn.com>
> To: meteorobs-owner@yahoogroups.com
>
>   This was originally posted on Thursday. It appeared as an
> undelivered message.
>
> So, a third attempt to no be e-challanged.
>
> Subject: re: Sporadic E outburst?
> > Date: Thu, 24 Oct 2002 13:37:25 -0000
> > From: "drobnock2" <drobnock@p...>
> > To: meteorobs@egroups.com
> >
> >" ... normal range for this effect?
> >
> > Is anybody else currently experiencing interference from Sporadic E?
> > Is it a global phenomenon, or just local?
>  >
> > All I know for sure is that my data for the Orionids is useless
> until> this episode ends.
>                  >
>  regards, Bruce McCurdy"
>                  >
> > Sporadic E is a local event. With a caution on "how local?"
>                  >
> > In general Sporadic - E occurs at midlatitudes 15 to 45 degrees in
> the > northern hemisphere during May to July, with a less frequent
> event by > the end of December. It occures independent of the solar
> cycle. The> occurance of Sporadic - E usually occures from 9am to noon
> local time > and again from 5pm to 8pm. The event may occur a few
> minutes to> several hours. The ARRL handbook (1999) comments that the
> Sporadic-E > event is an almost constant event in the polar regions at
> night.
>                  >
> > It is accepted that the event is an ionization in the E layer,
> > between 100 to 110 km and maybe between 10 to 100 km in extent (ARRL
> > Handbook 1999).
>                  >
> > Some speculation suggest the cause as heavy metal ions (meteors ?)
> or> high altitude wind shear.
>                  >
> > The ARRL published a two part article with in the past two years on
> > new research on the Sporadic - E. I'll try to locate the exact date.
> > Or maybe someone may have that information available.
>                  >
>                  > George John Drobnock

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